Whistle



E. MIC'HA'UD.

WHISTLE'1 APPLICATION FILED NOV.29. i918.y

Patented Dec. 9, 1919.

fighe UNITED j sTATEs PATENT oEErcE. i

g, ELzEAn MICHAUD, or CHICAGO, ILLINOIS.

. WHISTLE.

To all whom t 'may concern:

Be it known that I, ELZEAR MICHAUD, a citizen of the United States, residin at Chicago, in the county of Cook and tate of Illinois,have invented new and useful Improvementsk in Whistles, of `which, the following is a full, clear, conciseand exact description, reference being had to the accompanying drawing', forming a part of this specification. l j

VMy invention relates to improvements in whistles, and has for its object, the production of a device, parts of which are so arranged as to accomplish the desired results with certainty.

A further object is the production of. a device embodying positive valve action and one in which the spring member is so situated as to be prevented from buckling.

A further object isv the production of a device in which the amount of air intro-v view on the line 3-3 of Fig. 2 looking in the direction indicated by the arrows. j

Fig. l represents a bottom plan view of my device.

Fig. 5 represents a fragmentary elevation partly in section of a modified form of my device. v j

Fig. 6 represents a perspective view of Fig. Y

Fig. 7 represents a plan view of my improved plunger.

Like numerals of reference indicate like parts inthe several figures of the drawings.

Referring now to the drawings- My device comprises a metal base 7, to which is secured a metal cylinder 8, Vthe interior of which forms the resonance Vspemumaion of Letti-.fs Patent. Application mea November 29,1918. serial iin-atasco.

Patented Dec. 9, `1919.

chamber ofthe whistle. The casting 7, has a circumferential iange 9, at its lower end adapted to receive a pipe or tube 10, 'communicating with the source of pressure. Av

vertical opening 1l,.co1nmunicates with this source of pressureV and opens into a horizontal valveV chamber 12. From,v the leXtreme end of this chamber, a passage '13,Ycommunicates with a circumferential channel,

14, in the upper portion of the castingl formed inside -the circinnferential iange 15. A centrallydisposed boss 17, projects upwardly vfrom the casting and is bored to rcceive the retaining bolt 18, which is screwthreaded at its lower end as shown at 19.

flanges 21, adapted to engage and iit snugly against the outer, walls of the cylinder 8.

VThis diaphragm` is Aalso provided with Va centralbore or opening 22 through which the retaining bolt 18, passes. Y

The top of the cylinder 8, is covered with a flanged cap 23, through which the bolt 18 passes and a nut 24 isscrewed on the vupper end ofthe bolt so that by'tightening this nut the casting, diaphragm and -cylinder top and the cylinder itself are rigidlyV secured together. In the lower portion of the side ofthe cylinder just above the diaphragm, I provide the ordinary whistle mouth 25, which is slightly vdished inwardly at the top as shown at 26, thus to permit the air to be deflected andconsequently increaseV the sound.

Within the valve chamber 12, is mounted a cylindrical pin or valve stemfpin'27, having its end cut away forming a curved deiiecting surface 28. The casingV 7 is provided at one side with a projecting boss 29 having a diagonal groove 30 cut therein. A connecting arm or crank pin V31p is secured to the outer end of the valve rod 22 and is Varranged to travel in the groove 30. The

outer face 32, of thegroove acting as a cam track for the crank pin. so when it is operated to revolve the pin 27, it also moves it ioo forward. The lever arm`33, is attached to v the end of the crank pin at'3l to one arm of which 35, is secured a spring 36, the Vother end being connected with the spring sup port 37 mounted on the side of the cylindrical casing. To the outer end of theV other arm 38, is

attached a connection 39, which extends to a hand control (not shown.) rlhe diaphragm Q0, is provided with a curved slot permitting communication vbetween the resonance chamber and the chamber 14 formed in the upper portion of the casing below the diaphragm. Gn the upper surface of the diaphragm is mounted a sliding valve plate 41, pivotally secured to one end by means of a screw member 42. The mem ber 41, is so placed as to be concentric with the slot 40, so when the member is moved forward or back, it opens or closes the slot. It will be noted that this slot is preferably placed on the side of the diaphragm opposite the inlet passage 13.

In the operationo'f this form of my device, whenthe parts are in the position indicated in 2, the round surface of the valve pin 27, covers the opening 11, thus preventing the ingress of steam or pressure from the source of supply. lt is held in this position'by the spring 36, through its connecting members. T he size of the slotted opening 40, in the diaphragm has been justed so as to permit the entrance of the right amount of pressure and the compressed steam or air is forced in and around the chamber 14 up through the `slot 40 where it strikes the edge of the mouth 25, and is deflected causing the whistlingI noise desired.

The character of the sound can be variedb)7l varying the size of the resonance chamber, and also the amount of steam permitted to enter therein through the slot 20, the area of which can be varied at will.

In the modified form of my device, illus trated in Figs. 5 and 7, the casting 7 is formed in hexagonal form to permit the use of a wrench in assembling and disassembling the parts, and certain modifications appearing in respect to the valve controlling the. intake. In this' form, the casting is provided with a central bore 43, in which is mounted the valve pin 44, having a portion cut away as shown atthe cut being curved and extending possibly half way through the rod. A spring 46 isinterposed between the end of the stem and an adjustable screw 47. which is screwed in the end of the opening 43, thus confining the spring between the ends of the bolt 47 and the end of the valve rod. An upwardly extending ear 48, is provided and a lever. 49, mounted thereon as indicated at 50. The lower arm 51, Vof the lever, is pivotally connected at with the outer end of the valve rod 44 and to the upper end of the upper member 53,- is a connection 54. terminating in a hand control (not shown) same as shown at 39 in Fig. 1. ln this form, the pressure passes through the passage and in the chamber 56, below the diaphragm and out through the opening into the resonance chamber in exactly the same manner as in the preferred form, the only difference in this construction being in the operation of the valve permitting the ingress of the air.

ln tl e operation of this form of my device, the spring 43, presses the front rod 44, out until the end of the arm 53, strikes the side of the cylinder in which position the valve is closed` Then it is desired to open the valve for the purpose of whistling, the connecting rod or chain 54 is pulled forwardly forcing the valve rod 44 against the pressure of the spring` until the dished out portion 45, reaches the position shown in dotted lines 45. At which time a clear passage is provided from the source of steam to the whistle and the whistle continues to sound so long as the connecting rod is' pulled. `When the pull is removed, the spring forces the rod 44 back into its position shown in full lines and closes the opening.

In the form of rod shown in Fig. 7, the outer end is preferably slotted as shown at 57 although of course it is evident that the lower end of the klever 51 might be a' yoke and lit over the end of the rod.

1t is to be noted that the screw 47, is used as an adjustment screw to regulate the tension of the spring 43, so that the valve may be kept closed under any desired tension.

Another advantage in this construction is that when the screw is out the valve rod and spring may be removed and the bore cleaned of any accumulated dirt or carbon, it being simply necessary to run a brush through the bore lengthwise removing all foreign substances.

1 have thus shown simple and eiiicient construction by means of which a serviceable whistle is produced and one in which the parts are subject to the least possible strain and one in which the most accurate results` Gf course, 1t 1s to be un-V may be attained. derstood that it is possible to embody my invention in other` forms without departing from the spirit of myI invention.

lt will be noted that the fact that 'the valve stem pin 27, is given a spiral. motion through the cam shaft, serves to keep the AValve Opening clear from carbon as the edges of the inclined surface 28, become cutting edges when they pass the opening 11, and cut off any carbon that may happen to have accumulated therein. L

1. In a whistle, the combination with a supporting casting having a depression in its upper face; aresonance chamber mounted thereon; a diaphragm having an opening therein interposed between said chamber and casting; means for varying the area of said opening; a source of pressure communicating with the interior of said casting below said chamber and means for controlling the amount of pressure entering therein.

2. In a whistle, the combination with a supporting casting having a depression in its upper face; a resonance chamber mounted thereon; e diaphragm having an opening therein interposed between said chamber und casting; means' for Varying the area of said opening; said means comprising a slid ing member mounted on the top of saidV diephragm; L source of pressure communicating with the interior of said casting below vsaid `Chamber and means for controlling the amount of pressure entering said chamber. 10

In Witness whereof, I have hereunto subscribed my name.

ELZEAR MICHAUD.` 

